Baylessmummy, I remember thinking when you first posted that your son had
"bottle aversion" I think you called it - the first thought that popped into my head was that maybe to him, eating = don't feel good (cramping, gas, diarrhea). So he has learned to try to avoid something he associates with pain? Just a thought but I'm certainly not a medical professional. Good luck and I hope you get some answers soon from the right medical professionals! Keep working for your son!